Ofdm Constellation Settings; Ofdm Evm Display - Tektronix SPECMON3 Manual

OFDM Analysis
Elements of the Display
Item Display element
1 Plot
2 Marker Readout
xxx

OFDM Constellation Settings

Front Panel: Settings
Application Toolbar:
The OFDM Constellation Settings control panel provides access to settings that control parameters of the
Constellation Display.
Settings tab
Modulation Params (see
page 244)
Advanced Params (see
page 245)
Data Range (see page 246)
Analysis Time Tab (see
page 246)
Trace (see page 248)
Scale Tab (see page 248)
Prefs Tab (see page 250)
xxx

OFDM EVM Display

The OFDM EVM display shows the data symbols' individual subcarrier Error Vector Magnitude values
versus symbol interval (time) and subcarrier (frequency).
To show the OFDM EVM display:
1. Press the Displays button or select Setup > Displays.
2. In the Select Displays dialog, select OFDM EVM in the Folders box.
3. In the Available displays box, double-click the OFDM EVM icon or select the icon and click Add.
The OFDM EVM icon will appear in the Selected displays box and will no longer appear under
Available displays.
SPECMON3 & SPECMON6 Printable Help
Description
Constellation graph.
If markers are enabled, the marker readout shows the selected Marker,
Symbol, Subcarrier, Type, Value, Magnitude, and Phase for the symbol at
the marker location. Located to the left of the constellation plot or below it,
depending on the size of the window.
Description
Specifies the input signal standard and additional user-settable signal parameters.
Specifies parameters used by the instrument to analyze the input signal.
Specifies which symbols and subcarriers of the signal to display.
Specifies parameters that define the portion of the acquisition record that is used for
analysis. Also allows you to specify the Units (Symbols or Seconds) for OFDM Analysis
displays.
Enables you to freeze the display or hide the measurement or average trace.
Specifies the Zoom scale, and vertical and horizontal positions of the display.
Specifies the units of the display and whether elements of the graphs are displayed.
OFDM Constellation Settings
231